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About Us

The contracting and recruitment world offers lots of opportunities for professionals, and StrongLeaf offers services in a way that is different from any solution you’re used to in the market.

Founded in 2011 as a  family business, we started off with a niche product: a specialized payroll service for cross-border contractors. Because this is a rather narrow product and our business partners and clients asked for more options, we decided to expand our service inventory. The different possibilities we offer for a part payroll solution today is the most well-known of our range of services.

To further answer to the market demand, we considerably increased our in-house capacity by developing and implementing our own, user-friendly online portal.

"Highlighting the Human in Human Resources"

Throughout the years it became obvious that our clients are very loyal. This is due not only to the high quality service. It also, and maybe mainly, has to do with the way we treat people. Which is the only way we know how to: as people. There seems to be a contradiction in the term Human Resource, but we aim to overcome this contradiction by living up to our company values, of which trust and clarity are the most important ones. 

Building further on our apparently unique take on business ethics, we launched a completely new service range in 2016: StrongLeaf Business Ethics Consultancy. Because we believe that in the end, it is our and your humanity, and not money, that will help us knowing how to behave, work, and survive.

I have finally found a partner that understands about communication and keeping people informed. I must say I have been highly impressed, and believe me I am not easy to please.

Craig Crighton

Our Team

Ron van Lieshout

Ron van Lieshout


Founder of StrongLeaf, father of Marlie and Roel, granddad of Rosa, Sofie and Naline.

Likes: Campers, Boats, cars, pugs, Brabantse 'worstenbroodjes'.

Sanne C.

Sanne C.

Admin Team Member

As StrongLeaf started in Feb.2019 to work with a Back-Office for our common administrative tasks, Sanne showed to be a real asset to the StrongLeaf Community. You will see her name on many emails and "when you are lucky" you will also get her on the phone when dialling our Office number.

Sabina  v. M.

Sabina v. M.

Admin Team Member

As StrongLeaf started in Feb.2019 to work with a Back-Office for our common administrative tasks, Sanne showed to be a real asset to the StrongLeaf Community. You will see her name on many emails and "when you are lucky" you will also get her on the phone when dialling our Office number.

Henny Claassen

Henny Claassen

Admin Team Member

Saving Angel of StrongLeaf, never too busy to take on some more work. 

Likes: Hiking, fashion, jigsaw puzzles, gardening. 

Fun fact: Bakes the BEST apple pies in the world!

Martijn de Geus

Martijn de Geus

Application Specialist

Indispensable help for 1,000 issues and more; creator of our portal and website.

Likes: People who think before they act, nature, science.

Quote: "Impossible is impossible."

Martin Friesen

Martin Friesen

Financial Administrator

Tamer of StrongLeaf's internal numbers and figures.

Likes: His wife, his two dogs, shooting with bow and arrow and nice weather.

Fun fact: Lives across the street from StrongLeaf's office.

Bart P.

Bart P.


Bart, is hired but feels as part of our team, he knows all about our technical systems IT, communicaions etc. Whenever something doesn't work or needs to be replaced or upgraded, he is helping out our team.

Likes, technical stuff, his family and their little black pug


StrongLeaf Payroll offers personal and broad service for your salary and payrolling administration. All our payrolling clients get a tax and income advice for their specific personal situation. Our clients are divided into two categories: Self-employed and employed by us. A thorough screening of your personal circumstances and priorities will be part of the intake process, after which you will have the knowledge necessary to make the best decision. 

Clients employed by us may use the specialized all-in package deals for the placement at projects through the well-known, larger recruitment agencies. 

For self-employed clients wishing or required to cooperate with a payrolling agency, we provide specialist knowledge to make this happen. We offer a range of solutions that fit your individual (inter-)national situation, even when work and home cross borders.

StrongLeaf helped me feel at home from the start, I would recommend them to all of my co workers.


Business Ethics Consultancy

Involve Ethics

Our former operational manager Marlie van der Heijden developed a completely unique and scientific take on the theory and management of business ethics. In June 2018 she started her own training and consulting company, Involve Ethics of which StrongLeaf is a proud partner. More info can be found on (website text only in Dutch).
Involve Ethics is available for:

- FunEthics activities
- (Strategic) business ethics consultancy
- Seminars / Congresses
- Business Ethics Courses (values, culture, integrity, compliance)
- Moral deliberation group sessions
- Socratic conversations

Involve Ethics’ pragmatistic method

The basic understanding of this unique method is taught in interactive courses that are all custom-made, and can be made accessible to all types and levels of staff. For larger groups you might consider booking a seminar. Location of seminars and courses is flexible and is possible throughout Europe. All services available in Dutch and English.

Marlie is a licensed teacher of philosophy, an experienced moral / socratic conversation leader and an inspiring coach for your employees and / or clients. For more information, please contact Marlie via

I feel able to work without worrying about any surprises. StrongLeaf are prompt with queries and payments, and I would highly recommend them for anyone contracting as expat in The Netherlands.


Extra services

Settling in a new country can be a tough nut to crack, especially while you are busy getting started on your new job.

This is why StrongLeaf has several collaborations with trustworthy service companies helping you to get your personal things straight without having to worry too much.

These services include finding a home, relocating your furniture, finding a school or day care center for your children, and so on. Because we care about our clients as if they are our own colleagues, we make sure our partner service companies provide our clients with the best solutions, care and attention possible.

Their performance is monitored and evaluated by us at set times to continuously ensure the best service.

StrongLeaf went out of their way to support me. Not only do they provide excellent and timely service but also operate with a professionalism that is rarely found. I would definitely highly recommend.


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